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lawyer [7]
4 years ago
8

Erica solved the equation −5x − 25 = 78; her work is shown below. Identify the error and where it was made. −5x − 25 = 78 Step 1

: −5x − 25 − 25 = 78 − 25 Step 2: −5x = 53 Step 3: negative five times x over negative five = fifty-three over negative five Step 4: x = negative fifty-three over five
Mathematics
2 answers:
Mkey [24]4 years ago
7 0

Answer:

She shoulda added by 25 not subtracted hope this helps

please make brainliest.

Step-by-step explanation:


7nadin3 [17]4 years ago
6 0

Answer:

she should have added 25, not subtracted 25

Step-by-step explanation:


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Find the derivative of the trigonometric function using the Chain Rule.<br>y=cos✓x<br>​
scoundrel [369]

If <em>y</em> = cos(√<em>x</em>), then by the chain rule

d<em>y</em>/d<em>x</em> = d/d<em>x</em> [cos(√<em>x</em>)]

d<em>y</em>/d<em>x</em> = - sin(√<em>x</em>) d/d<em>x</em> [√<em>x</em>]

d<em>y</em>/d<em>x</em> = - sin(√<em>x</em>) (1 / (2√<em>x</em>))

d<em>y</em>/d<em>x</em> = - 1/2 sin(√<em>x</em>) / √<em>x</em>

7 0
3 years ago
What is the derivative of ln(lnx^3)
chubhunter [2.5K]

the derivative of ln(lnx^3) is \frac{1}{x(lnx)} .

<u>Step-by-step explanation:</u>

Here we have to find the derivative of ln(lnx^3) , Let's find out:

We have , ln(lnx^3) , Let's differentiate it w.r.t x :

⇒ \frac{d(ln(lnx^3))}{dx}

Let lnx^3 = u

⇒ \frac{d(ln(u))}{dx}

⇒ \frac{1}{u} (\frac{d(u)}{dx} )

⇒ \frac{1}{u} (\frac{d(ln(x^3))}{dx} )

Let x^3=v

⇒ \frac{1}{u} (\frac{d(ln(v))}{dx} )

⇒ \frac{1}{u}(\frac{1}{v} ) (\frac{d(v)}{dx} )

⇒ \frac{1}{u}(\frac{1}{v} ) (\frac{d(x^3)}{dx} )            

⇒ 3x^2(\frac{1}{u})(\frac{1}{v} )

Putting value of u & v we get:

⇒ 3x^2(\frac{1}{lnx^3})(\frac{1}{x^3} )

⇒ \frac{3}{x(lnx^3)}    { lnx^n = n(lnx)  }

⇒ \frac{3}{3x(lnx)}

⇒ \frac{1}{x(lnx)}

Therefore , the derivative of ln(lnx^3) is \frac{1}{x(lnx)} .

6 0
3 years ago
Marla is making 2 liters of cherry lemonade, 5 deciliter dog limeade and 2,500 milliliters strawberry lemonade for a party after
Nata [24]

→Answer:

3.2 liters of lemonade were consumed during the party.

→Step-by-step explanation:

<u><em>What we know</em></u>

_____________________________________

Well there is 2,500 mL of strawberry lemonade

There are  2 liters of cherry

There are 5 deciliters of dog limeade

_____________________________________

So the 5 deciliters of dog limeade doesn't count because it is limeade, not lemonade.

The question is asking for the number of liters so we need to convert the 2,500 milliliters of lemonade to liters.

Which will be 2.5 liters of lemonade.

There are also 2 liters of cherry lemonade so 2.5 + 2 is 4.5.

So if 1.3 liters were left over doing 4.5 - 1.3 we get 3.2, meaning 3.2 liters of lemonade were consumed during the party.

4 0
3 years ago
If Alex spent $25 on his dinner and he wants to leave the waiter a 19% tip, how much would Alex give as TIP?
Lubov Fominskaja [6]

Answer:

$4.75

Step-by-step explanation:

Given:

$25

19%

let x = total amount of tip

x = ($25)(19%)

x = $4.75

7 0
3 years ago
The Patels took out a 15-year mortgage. How many monthly payments will they have to make on this mortgage?
VikaD [51]
There are 12 months in a year, and 15 years to pay the mortgage.

Therefore you are simply doing 12 multiplied by 15.

12 × 15
= 180

So your answer is C. 180
4 0
4 years ago
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